This session will give a comprehensive overview of the security features of Lync. It will explain, how clients know which servers to trust, options for client authentication as well as what we are doing to encrypt communication between endpoints. The content of this session is based on real experiences from such discussions with security departments of several customers. Objectives: 1. describe Lync 2013 security capabilities. 2. determine how to position Lync when discussing with security departments. 3. convince the customer that Lync will meet their security requirements